Welcome to Gero Nexus - Gero Nexus Documentation

Gero Nexus is a powerful Cardano blockchain API that provides developers with instant access to blockchain data. Built by the team behind GeroWallet, Gero Nexus offers enterprise-grade reliability with a developer-first approach.

Quick Start

Get your first API call running in under 5 minutes

API Reference

Explore our comprehensive API documentation

Authentication

Learn how to authenticate your API requests

Rate Limits

Understand API rate limits and quotas

Why Gero Nexus?

Fast & Reliable

Sub-second response times for all endpoints
99.9% uptime SLA for paid plans
Global CDN for low latency worldwide
Real-time updates with WebSocket support

Developer-Friendly

RESTful API with OpenAPI 3.1.0 specification
Interactive playground to test endpoints
Comprehensive SDKs for popular languages
Detailed error messages for easy debugging

Cardano-Native

Built by Cardano experts from the GeroWallet team
Full blockchain coverage - blocks, transactions, assets, stake pools
Mainnet & testnet support
Epoch data and governance information

Generous Free Tier

10,000 requests/day on the free plan
No credit card required to get started
Full API access - no feature restrictions
Community support via Discord

Key Features

Comprehensive Blockchain Data

Access all Cardano blockchain data through simple REST endpoints:

Blocks: Query block data, headers, and confirmations
Transactions: Get transaction details, UTXOs, and metadata
Addresses: Look up address balances, transactions, and assets
Accounts: Retrieve stake account information and rewards
Assets: Native tokens, NFTs, and metadata
Epochs: Protocol parameters, stake distribution
Stake Pools: Pool information, performance metrics, delegators

Built for Production

Gero Nexus is designed to handle production workloads:

// Simple, production-ready code
const response = await fetch('https://nexus-dev.gerowallet.io/api/blocks/latest', {
  headers: {
    'Authorization': 'Bearer your-access-token'
  }
});

const latestBlock = await response.json();
console.log(`Latest block: ${latestBlock.height}`);

Interactive API Playground

Test API endpoints directly from your browser with our built-in playground. No code required - just authenticate and start exploring.

Use Cases

Wallets

Build non-custodial wallets with real-time balance and transaction data

DeFi Apps

Power DeFi applications with liquidity pool data and token information

NFT Marketplaces

Query NFT metadata, ownership, and transaction history

Analytics

Create blockchain analytics dashboards and monitoring tools

Trading Bots

Access real-time market data for automated trading strategies

Stake Pool Tools

Monitor stake pool performance and delegator information

Ready to Get Started?

Create an Account

Get Your Access Token

Make Your First Call

Follow our Quick Start guide to make your first API request

Build Something Awesome

Use our API Reference to explore all endpoints

Need Help?

Join our Discord

Get help from our team and community

Email Support

Reach out to our support team

Next Steps: Start with our Quick Start guide or dive into the API Reference.

Documentation Index